1. On the Interference between Bow-generated Waves and Long Slender-ship at Low Froude-number

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概要

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• When the waves generated in bow region travel along a long slender-body, they meet deformation at middle body region. This phenomenon is difficult to explain by the classical wave-making theory. So far, the deformation of ship wave has been observed by many researchers, and this is known as the sheltering effect of body. In this paper an attempt for analysing the ship wave deformation is made under the assumption that the wave number ν (the ratio of the gravitational effect to the dynamical effect) is of order 0(ε^<-1>). This assumption means that the wave length is the same order of magnitude as the beam of a ship. The problem is solved by the method of matched asymptotic expansions using slender-body theory. Incidentally, it becomes clear that as far as the diffraction of ship waves near slender-body concerned, there are no differences between steady and unsteady ship motions. This is true under the condition that wave length is of the same order as beam. So, the nearfield problem coincides with that of Faltinsen's. The results obtained here can explain qualitatively the phenomena which have been observed in the experiments on an extremely slender-body.

• 社団法人日本船舶海洋工学会の論文

著者

• Adachi Hiroyuki

  Ship Research Institute

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• 1. On the Interference between Bow-generated Waves and Long Slender-ship at Low Froude-number

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